MARCH 29--The comedian Roseanne Barr last night tweeted the home address of George Zimmerman’s parents to her 110,000-plus Twitter followers, only to delete the posting after “not fully understanding that it was private not public.” Barr’s posting of the correct Florida address of Robert and Gladys Zimmerman came at the same time Spike Lee was issuing an apology for erroneously disseminating a tweet that purportedly contained the home address of George Zimmerman, who last month killed teenager Trayvon Martin. The residence cited by Lee is actually the home of an elderly couple with no connection to Zimmerman. Barr, who deleted...